Bug fix for version check and removed "Re-Install"

Version check would return instances of /mobility/ for Java SE SDK and
Java ME SDK in some instances.

Removed "Folder does not exist, try a different version" message as it
conflicted with version logic.

Removed "Multiple installations detected" message as /mobility/ bug
explained above would cause message to be displayed when only 1 version
was installed.

Removed "Re-Install" option, as it was simply redundant.